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Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Supplemental Cash Flow Information [Abstract]
Property acquired under capital leases	$ 20.1	$ 24.2
Interest payments	85.6	71.4
Income tax payments, net of income tax refunds	$ 112.2	$ 95.2

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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